3 Check that registration and ITSI ---/---: xxxx is displayed on the IFR Operations/Status
screen.
GROUP: XXXXXXX SELECTED
4.7.2
Testing Transmitter Using IFR 3901/IFR 3902/IFR 3920
Procedure:
1 To select RF Settings, press TAB.
2 Enter -90 for RF Gen level.
3 Switch ON the RF Gen.
4 Switch OFF the Pre Amp.
5 Press PTT.
NOTE: Press and hold the PTT to read the results.
Monitor the Transmitter Measurement Window that displays the results for the following:
• Power Profile
• Burst Timing
• Vector Peak
• Vector RMS
• Frequency Error
• Residual Carrier
Burst Power Required Results: 28.0–32.0 dBm (Class 4) or 30.5–34.5 dBm
(Class 3L) or 33–37 dBm (Class 3)
Power Profile: Passed
Burst Timing: ± 0.25 Symbols
Vector Error: Max 10% RMS, Max 30% Peak, Max 5% residual
Frequency Error: ± 100 Hz
6 Press TAB to select Operations/Status.
7 Press Call Mobile→Group Call→Cleardown.
4.7.3
Testing Receiver Using IFR 2968
Prerequisites: This test requires programming the radio. Refer to TETRA Customer Programming
Software (CPS) User Guide.
Procedure:
1 Turn ON the radio.
The screen is Idle.
2 Do one of the following to enter the radio test page:
• Use CPS.
• Press Left→Right→Left→Menu.
MN006362A01-AL
Chapter 4 : Test Setup and Testing
41
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